Dielectric properties of SrBi 1.8 RE 0.2 Nb 2 O 9 (RE = Yb, Tm, Tb, Gd, Er, Sm and Ce) ceramics

Afqir, Mohamed; Tachafine, Amina; Fasquelle, Didier; Elaatmani, M.; Carru, Jean-Claude; Zegzouti, Abdelouahad; Daoud, Mohamed

doi:10.1016/j.solidstatesciences.2017.09.007

Cited by 17 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The change in the slope of the straight line occurred while passing through the Curie point showing the characteristic positive temperature coefficient of resistance (PTCR) effect. Such behaviour has been reported in Lasubstituted SrBi 2 Nb 2 O 9 ceramics [27,28].…”

Section: Methodssupporting

confidence: 73%

Structural, electric and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics obtained by co-precipitation route

Afqir

Tachafine

Fasquelle

et al. 2018

PAC

Self Cite

View full text Add to dashboard Cite

This paper presents a study of the structure and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics prepared by co-precipitation route and sintered at 850?C. The materials were examined using XRD and FTIR methods. XRD data indicated the formation of well crystallized structure of the pure and doped SrBi2Nb2O9, without the presence of undesirable phases. FTIR spectra do not bring a significant shift in the band positions. Moreover, the AC conductivity, dielectric constant and dielectric loss of the ceramics were determined through the frequency range [50 kHz-1MHz]. In particular, the dielectric constant (??) and dielectric losses (tan ?) of the SrBi2Nb2O9 and SrBi1.6Eu0.4Nb2O9 ceramics were measured as a function of temperature at various frequencies.

show abstract

Section: Methodssupporting

confidence: 73%

Structural, electric and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics obtained by co-precipitation route

Afqir

Tachafine

Fasquelle

et al. 2018

PAC

Self Cite

View full text Add to dashboard Cite

show abstract

“…14 In the case of SBN compounds doped with lanthanide, an increase in dielectric loss was observed due to the weight loss of bismuth during the sintering process. 15 The samarium or holmium substituted at bismuth has reduced the dielectric loss. 16,17 The red and green photoluminescence respectively has been noticed with either Eu 3+ or Er 3+ cations in SBN compound.…”

mentioning

confidence: 99%

Structural, Mechanical and Magnetic Characterization of Rare Earth Double Doped SrBi₂Nb₂O₉ lead Free Ceramics

Nagamani¹,

Kiran²,

Bhimavarapu³

et al. 2021

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

Lead free dielectric materials of Strontium Bismuth Niobate SrBi2Nb2O9 (SBN) and rare earth double doped SrBi1.8Pr0.1Gd0.1Nb2O9 (SBPGN), SrBi1.8Pr0.1Y0.1Nb2O9 (SBPYN), SrBi1.8Eu0.1Gd0.1Nb2O9 (SBEGN) and SrBi1.8Eu0.1Y0.1Nb2O9 (SBEYN) were prepared by two-stage solid-state reaction route. The XRD studies have confirmed the formation of single-phase orthorhombic crystal structure. The microstructural analysis showed the formation of plausible needle shaped grains in the prepared ceramics. The FTIR study was used to investigate the effect of preparation and doping processes on the band intensities of the spectra. Mechanical studies showed that SBEGN and SBEYN ceramics exhibited mild wear (<10−6 mm3 Nm−1) compared to others. The low friction coefficient values of SBPYN (0.044), SBEGN (0.058) and SBEYN (0.002) to that of SBN necessitate lattice strain in these materials. The VSM studies on the rare earth double doped SBN ceramic materials confirmed the induction and existence of magnetic order in SBPGN and SBEGN.

show abstract

“…As per our literature survey, rare earth group elements (or) lanthanides with incomplete 4f shell doped interleaved structures nd important technical applications in the eld of electronics and optoelectronics. The studies based on perovskite structure such as RMnO (R= Y, Dy, Ho, Tb, Yb etc.,) have exhibited multiferroic properties [15][16][17][18][19]. Lanthanides doped SBN compound demonstrated rise in the dielectric loss due to annihilation of bismuth during sintering process.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structural and Dielectric Studies on SrBi2-xGdxNb2O9 Lead Free Ceramics

Jaladi¹,

Rao

Workineh

et al. 2020

Preprint

View full text Add to dashboard Cite

In this manuscript, the structural and dielectric properties of Gadolinium (Gd3+) substituted at Bi-site of SrBi2-xGdxNb2O9 (x= 0.0, 0.4, 0.6 and 0.8) prepared by using solid state reaction are studied. XRD analysis revealed the formation of single phase with orthorhombic structure in SBN and Gadolinium modified SBN. It is found that cell parameters and volume were decreased with increase of Gd3+ ion concentration in SBN. SEM analysis revealed that the samples possess well defined needle shaped grains. The grain size of SBN was hindered by the presence of Gd3+ ion at Bi-site. The growth of single phase layered perovskite structure was confirmed from FTIR and Raman spectroscopy. The dielectric properties of Gd3+ ion doped SBN ceramics are studied as a function of frequency (50Hz-1MHz) from room temperature to 500ºC. It is observed that phase transition temperature (Tc) decreased from 430ºC to 330ºC with increase of frequency due to incorporation of Gd3+ ion in SBN. The broadness of peaks and decrease in Tc indicate the transition from a normal ferroelectric to ferroelectric-relaxor type. The study on variation of tanδ with temperature at different frequencies indicates that tanδ has larger values at higher temperatures. Further, the diffuseness parameter (γ) has been computed for all the compositions.

show abstract

Dielectric properties of SrBi 1.8 RE 0.2 Nb 2 O 9 (RE = Yb, Tm, Tb, Gd, Er, Sm and Ce) ceramics

Cited by 17 publications

References 32 publications

Structural, electric and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics obtained by co-precipitation route

Structural, electric and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics obtained by co-precipitation route

Structural, Mechanical and Magnetic Characterization of Rare Earth Double Doped SrBi₂Nb₂O₉ lead Free Ceramics

Synthesis, Structural and Dielectric Studies on SrBi2-xGdxNb2O9 Lead Free Ceramics

Contact Info

Product

Resources

About

Dielectric properties of SrBi 1.8 RE 0.2 Nb 2 O 9 (RE = Yb, Tm, Tb, Gd, Er, Sm and Ce) ceramics

Cited by 17 publications

References 32 publications

Structural, electric and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics obtained by co-precipitation route

Structural, electric and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics obtained by co-precipitation route

Structural, Mechanical and Magnetic Characterization of Rare Earth Double Doped SrBi2Nb2O9 lead Free Ceramics

Synthesis, Structural and Dielectric Studies on SrBi2-xGdxNb2O9 Lead Free Ceramics

Contact Info

Product

Resources

About

Structural, Mechanical and Magnetic Characterization of Rare Earth Double Doped SrBi₂Nb₂O₉ lead Free Ceramics